%pc relative addressing of string literals/const data

[Joakim Tjernlund]

Richard Henderson <rth@redhat.com> wrote on 2010/10/05 23:12:19:
>
> On 10/05/2010 01:55 PM, Joakim Tjernlund wrote:
> > I don't do x86 or alpha so let me ask: If you run the code on an address
> > != link address, will it do the right thing?
>
> Yes of course.  It wouldn't be -fpic code otherwise.

Just making sure

>
> > I tested the #pragma/no #pragma on PPC and the resulting code
> > was the same:
>
> Yes of course.  I said it wouldn't on PPC.

Here too :)

>
> > You can get at the GOT table using PC relative addressing so why not
> > strings or data in a similar fashion?
>
> Well, I suppose you could, with the right code model.  It's not
> compatible with generic -fpic code without using a second base
> register, which is unfortunate.

yes, but this could be a new PIC mode that uses a new better
PIC mode for everything. Especially one that doesn't require each function
to calculate the GOT address in the function prologue(why is that so?)

 Jocke